One thing that has surprised me this year is the amount of "guessing" I see going on. An official who is near a play will call nothing, then a flag will come flying in from 30 yards away. Sometimes it can be difficult to see a play when you are right on top of it, I'll grant that, but I've seen several occasions this year where the nearer official called it correctly and an official from 30 yards away comes in and overrules him on what was clearly a guess.
I have never officiated football but when Iowa went from two-person to three-person crews in basketball a few years ago, one of the mantras was "no more guessing." I'd rather miss a call because I didn't see it than guess, and guess wrong. And believe me I've done both!
Calling stuff that just didn't happen and/or guessing has just got to stop. Also, selective interpretation of what is and is not "irrefutable video evidence" is ruining the replay system.